Flopped trips... but Rock won't leave... Now what?

[crookdimwit]

Villain here is a rock. Hasn't raised once in 30+ hands and only played 2 total hands since I sat down. VPIP is <5.

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) internettexasholdem.com

UTG :#A500AF(Villain)/ ($27.40)
UTG+1 ($19.25)
MP1 ($24.75)
MP2 ($30.80)
MP3 ($11.35)
CO ($21.65)
Button ($12.40)
SB ($25)
Crookdimwit ($29.45)

Preflop: Crookdimwit is BB with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG :#A500AF(Villain)/ raises to $1</font>, <font color="#666666">4 folds</font>, CO calls $1, <font color="#666666">1 fold</font>, SB calls $0.90, Crookdimwit calls $0.75.

Flop: ($4) 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Crookdimwit bets $4</font>, Villain calls $4, CO folds, SB folds.

Turn: ($12) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Crookdimwit bets $12</font>, Villain calls $12.

River: ($36) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>

Crookdimwit ????